1. Department of Mathematics and Statistics University of Western Australia Perth WA Australia
2. Clinical Pharmacology and Toxicology Unit PathWest Perth WA Australia
3. Department of Anaesthesia and Pain Management Perth’s Children Hospital Perth WA Australia
4. Peri‐operative Medicine Team Telethon Kids Institute Perth WA Australia
5. Division of Emergency Medicine, Anaesthesia and Pain Medicine Medical School University of Western Australia Perth WA Australia
6. Division of Pharmacy School of Allied Health University of Western Australia Perth WA Australia